diff --git a/archive-tar.c b/archive-tar.c
index 7a535cba24..a58e1a8ebf 100644
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -202,7 +202,7 @@ static void prepare_header(struct archiver_args *args,
 			   unsigned int mode, unsigned long size)
 {
 	xsnprintf(header->mode, sizeof(header->mode), "%07o", mode & 07777);
-	xsnprintf(header->size, sizeof(header->size), "%011lo", S_ISREG(mode) ? size : 0);
+	xsnprintf(header->size, sizeof(header->size), "%011"PRIoMAX , S_ISREG(mode) ? (uintmax_t)size : (uintmax_t)0);
 	xsnprintf(header->mtime, sizeof(header->mtime), "%011lo", (unsigned long) args->time);
 
 	xsnprintf(header->uid, sizeof(header->uid), "%07o", 0);
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 8d97c84725..05decee33f 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -92,7 +92,7 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
 		oi.sizep = &size;
 		if (oid_object_info_extended(the_repository, &oid, &oi, flags) < 0)
 			die("git cat-file: could not get object info");
-		printf("%lu\n", size);
+		printf("%"PRIuMAX"\n", (uintmax_t)size);
 		return 0;
 
 	case 'e':
@@ -238,7 +238,7 @@ static void expand_atom(struct strbuf *sb, const char *atom, int len,
 		if (data->mark_query)
 			data->info.sizep = &data->size;
 		else
-			strbuf_addf(sb, "%lu", data->size);
+			strbuf_addf(sb, "%"PRIuMAX , (uintmax_t)data->size);
 	} else if (is_atom("objectsize:disk", atom, len)) {
 		if (data->mark_query)
 			data->info.disk_sizep = &data->disk_size;
diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 456797c12a..5790f0d554 100644
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -253,7 +253,7 @@ static void export_blob(const struct object_id *oid)
 
 	mark_next_object(object);
 
-	printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
+	printf("blob\nmark :%"PRIu32"\ndata %"PRIuMAX"\n", last_idnum, (uintmax_t)size);
 	if (size && fwrite(buf, size, 1, stdout) != 1)
 		die_errno("could not write blob '%s'", oid_to_hex(oid));
 	printf("\n");
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 2004e25da2..2a8ada432b 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -450,7 +450,8 @@ static void *unpack_entry_data(off_t offset, unsigned long size,
 	int hdrlen;
 
 	if (!is_delta_type(type)) {
-		hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), size) + 1;
+		hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX,
+				   type_name(type),(uintmax_t)size) + 1;
 		the_hash_algo->init_fn(&c);
 		the_hash_algo->update_fn(&c, hdr, hdrlen);
 	} else
@@ -1628,10 +1629,10 @@ static void show_pack_info(int stat_only)
 			chain_histogram[obj_stat[i].delta_depth - 1]++;
 		if (stat_only)
 			continue;
-		printf("%s %-6s %lu %lu %"PRIuMAX,
+		printf("%s %-6s %"PRIuMAX" %"PRIuMAX" %"PRIuMAX,
 		       oid_to_hex(&obj->idx.oid),
-		       type_name(obj->real_type), obj->size,
-		       (unsigned long)(obj[1].idx.offset - obj->idx.offset),
+		       type_name(obj->real_type), (uintmax_t)obj->size,
+		       (uintmax_t)(obj[1].idx.offset - obj->idx.offset),
 		       (uintmax_t)obj->idx.offset);
 		if (is_delta_type(obj->type)) {
 			struct object_entry *bobj = &objects[obj_stat[i].base_object_no];
diff --git a/builtin/ls-tree.c b/builtin/ls-tree.c
index fe3b952cb3..7d581d6463 100644
--- a/builtin/ls-tree.c
+++ b/builtin/ls-tree.c
@@ -100,7 +100,7 @@ static int show_tree(const struct object_id *oid, struct strbuf *base,
 						  "BAD");
 				else
 					xsnprintf(size_text, sizeof(size_text),
-						  "%lu", size);
+						  "%"PRIuMAX, (uintmax_t)size);
 			} else
 				xsnprintf(size_text, sizeof(size_text), "-");
 			printf("%06o %s %s %7s\t", mode, type,
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index e50c6cd1ff..32e2c6b186 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -2095,9 +2095,9 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
 			die(_("object %s cannot be read"),
 			    oid_to_hex(&trg_entry->idx.oid));
 		if (sz != trg_size)
-			die(_("object %s inconsistent object length (%lu vs %lu)"),
-			    oid_to_hex(&trg_entry->idx.oid), sz,
-			    trg_size);
+			die(_("object %s inconsistent object length (%"PRIuMAX" vs %"PRIuMAX")"),
+			    oid_to_hex(&trg_entry->idx.oid), (uintmax_t)sz,
+			    (uintmax_t)trg_size);
 		*mem_usage += sz;
 	}
 	if (!src->data) {
@@ -2122,9 +2122,9 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
 			    oid_to_hex(&src_entry->idx.oid));
 		}
 		if (sz != src_size)
-			die(_("object %s inconsistent object length (%lu vs %lu)"),
-			    oid_to_hex(&src_entry->idx.oid), sz,
-			    src_size);
+			die(_("object %s inconsistent object length (%"PRIuMAX" vs %"PRIuMAX")"),
+			    oid_to_hex(&src_entry->idx.oid), (uintmax_t)sz,
+			    (uintmax_t)src_size);
 		*mem_usage += sz;
 	}
 	if (!src->index) {
diff --git a/diff.c b/diff.c
index 8647db3d30..88aaed7d49 100644
--- a/diff.c
+++ b/diff.c
@@ -3227,7 +3227,7 @@ static void emit_binary_diff_body(struct diff_options *o,
 	}
 
 	if (delta && delta_size < deflate_size) {
-		char *s = xstrfmt("%lu", orig_size);
+		char *s = xstrfmt("%"PRIuMAX , (uintmax_t)orig_size);
 		emit_diff_symbol(o, DIFF_SYMBOL_BINARY_DIFF_HEADER_DELTA,
 				 s, strlen(s), 0);
 		free(s);
diff --git a/fast-import.c b/fast-import.c
index 95600c78e0..69886687ce 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -2955,8 +2955,8 @@ static void cat_blob(struct object_entry *oe, struct object_id *oid)
 		die("Object %s is a %s but a blob was expected.",
 		    oid_to_hex(oid), type_name(type));
 	strbuf_reset(&line);
-	strbuf_addf(&line, "%s %s %lu\n", oid_to_hex(oid),
-						type_name(type), size);
+	strbuf_addf(&line, "%s %s %"PRIuMAX"\n", oid_to_hex(oid),
+		    type_name(type), (uintmax_t)size);
 	cat_blob_write(line.buf, line.len);
 	strbuf_release(&line);
 	cat_blob_write(buf, size);
diff --git a/http-push.c b/http-push.c
index d1f52cbdf6..cd48590912 100644
--- a/http-push.c
+++ b/http-push.c
@@ -365,7 +365,7 @@ static void start_put(struct transfer_request *request)
 	git_zstream stream;
 
 	unpacked = read_object_file(&request->obj->oid, &type, &len);
-	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), len) + 1;
+	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(type), (uintmax_t)len) + 1;
 
 	/* Set it up */
 	git_deflate_init(&stream, zlib_compression_level);
diff --git a/ref-filter.c b/ref-filter.c
index 0c45ed9d94..aaac48ad14 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -878,7 +878,7 @@ static void grab_common_values(struct atom_value *val, int deref, struct expand_
 			v->s = xstrdup(type_name(oi->type));
 		else if (!strcmp(name, "objectsize")) {
 			v->value = oi->size;
-			v->s = xstrfmt("%lu", oi->size);
+			v->s = xstrfmt("%"PRIuMAX , (uintmax_t)oi->size);
 		}
 		else if (deref)
 			grab_objectname(name, &oi->oid, v, &used_atom[i]);
diff --git a/sha1-file.c b/sha1-file.c
index dd0b6aa873..4a67e0e759 100644
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -833,7 +833,7 @@ int check_object_signature(const struct object_id *oid, void *map,
 		return -1;
 
 	/* Generate the header */
-	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(obj_type), size) + 1;
+	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(obj_type), (uintmax_t)size) + 1;
 
 	/* Sha1.. */
 	the_hash_algo->init_fn(&c);
@@ -1492,7 +1492,7 @@ static void write_object_file_prepare(const void *buf, unsigned long len,
 	git_hash_ctx c;
 
 	/* Generate the header */
-	*hdrlen = xsnprintf(hdr, *hdrlen, "%s %lu", type, len)+1;
+	*hdrlen = xsnprintf(hdr, *hdrlen, "%s %"PRIuMAX , type, (uintmax_t)len)+1;
 
 	/* Sha1.. */
 	the_hash_algo->init_fn(&c);
@@ -1758,7 +1758,7 @@ int force_object_loose(const struct object_id *oid, time_t mtime)
 	buf = read_object(oid->hash, &type, &len);
 	if (!buf)
 		return error(_("cannot read sha1_file for %s"), oid_to_hex(oid));
-	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), len) + 1;
+	hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(type), (uintmax_t)len) + 1;
 	ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime);
 	free(buf);
 
